Jeff of the Jungle swings on a 7.6-m vine that initially makes an angle of 42 ∘
with the vertical. Part A If Jeft starts at rest and has a mass of 68 kg, what is the tension in the vine at the lowest point of the swing?

Answer:

What she can do to collect the data is;

B. Gather a few oranges and see how many seeds are in each

Explanation:

The quantity Katie wants to find out is the number of seeds contained in each orange

Therefore, the required population = The number of seeds in a given orange

The method of estimation of the number of seeds per orange is sampling method, whereby the number of seeds in each of the orange in the sample is used to as an hypothesis as to the number of seeds expected in each orange of the entire population.

Therefore, in order to collect the data, she can gather a few oranges and see how many seeds are in each.

Sure, here are the steps to rank the fictitious stars based on their brightness as seen from Jupiter:

Determine the distance of each star from Jupiter. The closer a star is to Jupiter, the brighter it will appear in the sky.

Use the inverse square law to calculate the relative brightness of each star as seen from Jupiter.

The inverse square law states that the brightness of an object decreases with the square of its distance from the observer.

So, if star A is twice as far away from Jupiter as star B, it will appear four times dimmer than star B.

Rank the stars based on their relative brightness.

The star that appears brightest from Jupiter will be ranked first, while the star that appears dimmest will be ranked last.

Keep in mind that the brightness of a star also depends on its intrinsic brightness, or luminosity.

A star with a higher luminosity will appear brighter than a star with a lower luminosity, even if they are at the same distance from Jupiter.

However, since the set of stars is fictitious and we do not have information about their intrinsic brightness, we cannot take this factor into account in our ranking.

Overall, to rank the fictitious stars based on their brightness as seen from Jupiter, we need to consider their distance from Jupiter and use the inverse square law to calculate their relative brightness.

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Answer:

chemical energy to sound energy Explanation: BATTERY CONSISTS OF CHEMICAL ENERGY.WHEN OUR RADIO IS OPERATED BY INSERTING BATTERY INTO IT,CHEMICAL ENERGY IN BATTERY IS CONVERTED INTO SOUND ENERGY AND THUS WE HEAR SOUND FROM THE RADIO.

Explanation:

Answer:

F = m*a

therefore m = F / a

m = 100 / 5 = 20 kg?

hope this helped you

Explanation:

The required mass of man, undergoing the acceleration is of 75 kg.

Given data:

The magnitude of acceleration of man is, a = 4 m/s².

The magnitude of action force on the man is, F = 300 N.

Here we can apply the Newton's second law of motion, which says that the applied force causes the acceleration of any object. Where the applied force is equal to the mass of object and the magnitude of acceleration of object.

Therefore,

F = ma

Solving as,

300 = m × 4

m = 300/4

m = 75 kg

Thus, we can conclude that the mass of man, undergoing the acceleration is of 75 kg.

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The time that is taken by the cart is given as 34.7 s.

Let us have it at the back of our minds that what we are dealing with here is the velocity and that the velocity of the object can be said to be a vector quantity. If it is a vector quantity, we would need to look at the magnitude and the direction of the quantity.

We can now see that the velocity of the object can be defined as the change in the velocity of the object with time. We can now write;

V = Δx/t

V = velocity

Δx = change in the displacement

t = time

Then;

-0.418 = 5.40 - 19.9/t

t = -14.5/-0.418

t = 34.7 s

In the movement of the cart from one point on the plane to the other, the time that has been taken by the cart is about 34.7 s.

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The cost of energy is \($0.108/kWh\), so the cost of using each type of bulb can be represented as-

The first step is to find the amount of energy (in kilowatt-hours) used by each type of light bulb during the 290 hours of use. We can use the power and time equations:

Energy = Power x Time

For the conventional incandescent bulb:

Energy_incandescent = Power_incandescent x Time

\(Energy_incandescent = 40 W x (290 h)Energy_incandescent = 11600 WhEnergy_incandescent = 11.6 kWh\)

For the energy-efficient fluorescent bulb:

Energy_fluorescent = Power_fluorescent x Time

Energy_fluorescent = 11.0 W x (290 h)

Energy_fluorescent = 3190 Wh

Energy_fluorescent = 3.19 kWh

The cost of energy is $0.108/kWh, so the cost of using each type of bulb is:

Cost_incandescent = Energy_incandescent x Cost_per_kWh

Cost_incandescent = 11.6 kWh x $0.108/kWh

Cost_incandescent = $1.25 (rounded to the nearest cent)

Cost_fluorescent = Energy_fluorescent x Cost_per_kWh

Cost_fluorescent = 3.19 kWh x $0.108/kWh

Cost_fluorescent = $0.34 (rounded to the nearest cent)

The difference in cost between the two bulbs is the amount saved by using the energy-efficient bulb:

Savings = Cost_incandescent - Cost_fluorescent

Savings = $1.25 - $0.34

Savings = $0.91

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A) True. The change in temperature of an object depends only on the amount of heat gained or lost and its specific heat capacity, not on its mass or volume.

The specific heat of a substance is the amount of heat energy required to raise the temperature of a unit mass of the substance by one degree Celsius. Therefore, if two substances have the same mass and the same initial temperature and are supplied with the same amount of heat energy, they will experience the same size gain or loss of heat. This is because the specific heat is a property of the substance, and not dependent on the mass or volume. However, if the masses or volumes of the substances are different, then the temperature change will also be different, as the heat energy will be distributed over different amounts of material.

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Answer:

yes

Explanation:

this is true don't believe other people whether right or wrong

An example of a solid that sunlines is a billboard.

A billboard simply refers to a very large board which is usually, frequently and most of the time used for displaying advertisements

So therefore, an example of a solid that sunlines is a billboard

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Answer:

A. Some energy is always converted to unusable forms in the

Explanation:

The second law relates to the quality of energy. This law states that whenever energy is transformed, some of must be degraded into a less useful form. In ecosystems, the biggest losses occur as respiration. 

hope it helps you and give me a brainliest

Answer:

ok so I'm going left to right

a) 3 2 1 4

b) i don't know

The utilization of aquifers beyond their flow and recharge capacities is known as overexploitation.

Overexploitation refers to the unsustainable use of natural resources beyond their capacity to replenish or regenerate. It occurs when the extraction or utilization of a resource exceeds its natural renewal rate, leading to its depletion or degradation.

Overexploitation occurs when the rate of water extraction from an aquifer exceeds the natural replenishment rate, leading to a depletion of groundwater resources. This unsustainable practice can result in a range of negative consequences, including declining water levels, reduced water quality, land subsidence, and ecological impacts.

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In many places, the utilization of aquifers beyond their flow and recharge capacities is known as groundwater over-drafting.

Aquifer is a type of underground rock formation that can contain and transmit groundwater. Water stored in aquifers is often extracted to meet the needs of society. However, when the usage of aquifers exceeds their flow and recharge capacities, it results in the depletion of aquifers. The overuse of aquifers can have a significant impact on the environment and economy.  As a result of excessive withdrawal, the water levels in aquifers decrease, resulting in the lowering of the water table, which can cause land subsidence, seawater intrusion, and other environmental problems. In some regions of the world, over-drafting has resulted in the complete exhaustion of aquifers, resulting in serious problems for the population. In conclusion, the overuse of aquifers beyond their flow and recharge capacities can have severe impacts on the environment, economies, and society. It is essential to adopt sustainable water management practices to ensure the long-term viability of our aquifers.

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As we travel down the group in the current periodic table, the atomic number rises. Although the nuclear charge likewise rises, the effect of the rise is mitigated by the addition of one shell. As we descend the group, electronegativity's value drops. For instance, in the halogen group, the electronegativity value falls as we proceed from fluorine to astatine.

Electronegativity is the propensity of an atom in a molecule to draw the shared pair of electrons toward itself.

Because it is merely a propensity, this attribute has no dimensions. It essentially represents the final consequence of atoms' propensities to attract electron pairs that form bonds in various elements. On several scales, we quantify electronegativity. Linus Pauling created the most widely used scale.

An atom's ability to attract the electrons of a bond grows with electronegativity, a feature of an atom. In a covalent bond, atoms that are bound together and have similar electronegativity values share electrons equally.

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Answer:

Answer

F=G×

d

2

m×M

m = 50 kg

M = 120 kg

Distance, d = 10 m

G=6.7×10

−11

Nm

2

/kg

2

F=6.67×10

−11

×

10

2

50×120

F=6.67×60×10

−11

F=4.02×10

9

N

Answer:

=4.002×10-⁷

Explanation:

(6.67×10-¹¹ ×50×120)/10²

=4.002×10-⁷

The percentage of the lost kinetic energy of the car, at the midpoint of the skid, is 50%.

In physics, work is the measurement of the energy used to move objects. When you are walking, you're using energy to move your body so the work done would be greater than zero.

According to work-energy theorem, work is equal to force times displacement (W = F · x).

A type of energy is kinetic energy, which is the energy of a moving object. If an object is at rest, its kinetic energy is zero. Kinetic energy is equal to one half of a mass times velocity squared (KE = 0.5 · m · v²).

When a car goes into a skid and comes to a gradual stop, at the midpoint of the skid the car has spend 50% its kinetic energy. This is simply because the velocity of the car at the midpoint of the skid is half the velocity of the car when the car starts going into a skid, assuming constant acceleration.

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The velocity of the dart just before it hits the block is approximately 1.38 m/s to the right.

We can solve this problem using the principle of conservation of momentum. The momentum of an object is defined as the product of its mass and velocity, and the total momentum of a closed system is conserved, meaning that the total momentum before a collision is equal to the total momentum after the collision.

Let the initial velocity of the dart be v, and let the final velocity of the dart and the block be vf. The momentum of the dart before the collision is given by p = mv, where m is the mass of the dart. The momentum of the dart and block after the collision is given by (m + M)vf, where M is the mass of the block.

Using the principle of conservation of momentum, we have:

p = (m + M)vf

Substituting the given values, we get:

0.012 kg v = (0.012 kg + 0.2 kg) 0.78 m/s

Simplifying, we get:

v = (0.212 kg) (0.78 m/s) / 0.012 kg

v ≈ 1.38 m/s

Therefore, the velocity of the dart just before it hits the block is approximately 1.38 m/s to the right.

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Assuming the raindrop was stationary relative to the vertical distance to the ground at the start:

D=0.5at where d is distance, a is acceleration and t is time

D is 300 meters

a is 9.8 meter/sec squared

Solve for t in seconds

t = 61.2 seconds

v=at where v is velocity

a is 9.8 meters per second squared

t is 61.2 seconds

solve for v

v = 600 meters per second.

If it had an initial vertical velocity (v0) at the start :

d= 0.5at+v0t

and

v=at+v0

Answer:

Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength. As we have discussed before, visible light represents a narrow group of wavelengths between about 380 nm and 730 nm.

OR

The primary properties of visible light are intensity, propagation-direction, frequency or wavelength spectrum and polarization, while its speed in a vacuum, 299 792 458 m/s, is one of the fundamental constants of nature.

Answer:

The instantaneous velocity at the top of its flight is  v = 0 m/s

Explanation:

From the question we are told that

   The  initial velocity is u = 25.0 m/s

Generally an  instantaneous velocity can be defined as the velocity of an object at an instant of  time period during its motion, , generally the velocity of a object at it maximum height is  0 m/s hence the  instantaneous velocity of the paintball at the top of its flight is  0 m/s

The following statement “a varistor is a two-terminal device which primarily changes in resistance as the temperature changes” is False.

A varistor is a two-terminal device that primarily changes its resistance in response to changes in voltage, not temperature. Varistors are voltage-dependent resistors, also known as voltage-dependent or voltage-sensitive resistors (VDRs). They are designed to protect electronic circuits from overvoltage conditions by acting as voltage clamps.

Varistors have a high resistance at normal operating voltages, but their resistance decreases significantly when the voltage exceeds a certain threshold, known as the "clamping voltage." They are made from semiconducting materials, usually metal oxide compounds such as zinc oxide, and their resistance characteristics are nonlinear, meaning the resistance decreases exponentially with increasing voltage.

When a varistor is subjected to excessive voltage, it starts conducting current, shunting the excess voltage away from the sensitive components of a circuit and preventing damage. Once the voltage returns to normal levels, the varistor's resistance returns to its high state.

Therefore, varistors primarily respond to changes in voltage, not temperature.

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Insulating the cable with rubber having a thermal conductivity of 0.15 W/m degree increases the heat flow from the cable to 63.80 W per meter length compared to a non-insulated cable in an atmosphere with a temperature difference of 50 degrees Celsius. The correct option is C.

To determine how the heat flow from the cable is affected by insulation, we need to calculate the heat transfer rate for both the insulated and non-insulated cases. The heat transfer rate can be determined using the formula:

Q = (T2 - T1) / (R_total)

Where:

Q is the heat transfer rate per unit length (W/m),

T2 is the surface temperature of the cable (75 degrees Celsius),

T1 is the ambient temperature (25 degrees Celsius),

R_total is the total thermal resistance.

For the non-insulated case:

R_total = R_convection

For the insulated case:

R_total = R_convection + R_insulation

Let's calculate the heat transfer rate for both cases:

Non-insulated case:

R_convection = 1 / (h * A)

A = 2 * π * r * L (surface area of the cable)

Q_non-insulated = (T₂ - T₁) / (R_convection)

Insulated case:

R_insulation = d / (k * A)

Q_insulated = (T₂ - T₁) / (R_convection + R_insulation)

Given the information:

h = 12.5 W/m² degree

k = 0.15 W/m degree

d = 10 mm = 0.01 m

T₂ = 75 degrees Celsius

T₁ = 25 degrees Celsius

By comparing the heat transfer rates for the non-insulated and insulated cases, we can determine the effect of insulation on the heat flow from the cable.

Therefore, by Calculating the values and comparing the heat transfer rates, we find that the correct option is c) 63.80 W per meter length.

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The statement which best describes the action- reaction force in the given situation is  the wall pushes on the skater when the skater pushes on the wall.

According to Newton's third law of motion every action is associated with an equal and opposite reaction. Thus, when we exert a force on the wall the wall exert a force in turn in equal magnitude but in opposite direction.

This law clearly explains the motion of an object by applying a force on another object like in the case of a rocket motion. In the given situation, the skater pushes the wall at the same time the wall in turn push him in opposite direction.

This opposite push exerted from the wall make him move upwards. Hence, option A is correct.

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Your question is incomplete. But your complete question probably was:

A skater pushes off a wall and skates backward for a few meters before stopping.

Which statement best describes an action-reaction force pair in this situation?

The wall pushes on the skater when the skater pushes on the wall.

The wheels slow down, and the skater stops.

The skater exerts a force on the wall, and the wheels exert a force on the floor and begin

to turn

The friction of the floor decreases when the wheels roll on the floor.

on

Extrasolar planet mass can be ten times as that of earth and it's size can be twice as that of earth.

GJ 504b is the planet having lowest mass detected around sun.

HAT-O-67b is the planet having the highest mass with diameter twice as that of Jupiter.

Results show that there are more small planets than the large ones which indicates that small planets are dominant in the galaxy.

Earth-sized planets are common in the galaxy.

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Answer:

The solubility of sodium chloride in water is 36.0 g per 100 g water at 20°C. The temperature must be specified because solubility varies with temperature. Or 36.0 g per 100 g

Explanation:

Answer:

Thats sounds like a club

Explanation:

Answer:

??

Explanation:

Answer:

4.3 km

Explanation:

Answer:

It will be 400 meters.

Explanation:

100 total seconds divided by 5 second interval equals 20.

Then 20 intervals multiplied by 20 meters per interval equals 400 meters.

Answer:

a

Explanation: